Mobile power-operated jack



Sept. 17, 1968 v. L. KNEELAND MOBILE POWER-OPERATED JACK 3 Sheets-Sheet l Filed Nov. 9. 1966 gm www Sept. 17, 1968 v. l.. KNEELAND 3,401,414

l MOBILE POWER-OPERATED JACK Filed Nov. 9, 196e 5 sheets-sheet 2 FIG. 2

INVENTOR. BY Y/ms Zfaw/l Sept. 17, 1968 Filed Nov. 9, 1966 v. L. KNx-:ELAND 3,401,414

MOBILE POWER-OPERATED JACK 5 Sheets-Sheet 5 FIG. 3

I INVENTOR. Y/m, 4M /Cwfyy ,gauw www@ United States Patent O MOBILE POWER-OPERATED JACK Verne L. Kueeland, 3 Smith Ave.,

Manchester, N.H. 03104 Filed Nov. 9, 1966, Ser. No. 593,081 4 Claims. (Cl. 12-127) ABSTRACT 0F THE DISCLOSURE A mobile power-operated jack comprising an elongated body carrying near one end a projecting last spindle and near the other a movable forepart pad, the body of the jack carrying at each end a power-operated tool for engaging and holding an insole in position on the bottom of a spindled last.

This invention comprises a mobile, power-operated jack for preparing shoe parts for various shoemaking operations such, for example, as side lasting.

The jack is mobile in the sense that it is connected to its source of power only by flexible compressed air tubes which are long enough to give the operator complete freedom of action in manipulating the jack for spindling it upon a bench or stand and for presenting it with shoe parts assembled thereon to any type of shoe machinery and at any angle. i

The jack is power operated in the sense that its various functions are carried out by valve-controlled power means for clamping an upper-carrying last in available position and positively pinning an insole upon the last bottom without the use of insole tacks.

The jack of my invention is characterized by a forepart pad actuated yby fluid pressure to tilt a last on the spindle of the jack and so cause the last to become bound or locked in fixed position and at the same time to clamp the upper in assembled position on the last.

' The novel jackris also characterized by an appliance adapted to operate at either toe or heel end of the last for fixing .the position of an insole by a fluid operated tool or tools in the nature of stab points driven by fluid pressure into or through the insole'on the bottom of the last. v j

These and other` features of the invention will be best understand and appreciated from the following description of a preferred embodiment thereof selected for purposes of illustration and shown in the accompanying drawings in which v FIG. l is a view in side-elevation of the jack,

' FIG. ,2 is a similar view of the forepart appliance, and

' FIG. 3 is a similar View of the heel and appliance.

The jack is herein shown as having a last locked in operative position on its spindle and enclosed in a shoe upper 11 which has been assembled on the last. The last has theconventional thimble 12 to receive the spindle of the jack.

The body of the jack comprises a tubular cylinder 13 into one end of which is fitted a solid shaft 14. This may be longitudinally adjusted to adjust the effective length of the body of the jack and clamped in adjusted position by a clamping screw 15.

The cylinder 13 of the body has a solid end which is drilled to receive a spindle 16 that is adjustably retained therein by a clamping screw 17. The outer solid end of the cylinder 13 is extended in the form of a guide bar 18 upon which the heel end appliance is supported as will be presently described.

The spindle 16 extends entirely through the cylinder 13 and carries the last 10 upon its upper end while its lower end may be used to spindle the jack in its position as shown in FIG. 1. The upper may be adjusted on the last while the jack is spindled upon a bench or stand ICC as shown or while the whole jack is supported in inverted position.

The shaft 14 carries the forepart pad 20 and its operating mechanism. The pad itself has a tubular shank 21 adjustably retained by a set screw 22 on an upwardly projecting rod or stem 23. The stem 23 is in the nature of a piston rod which extends downwardly in FIG. 1 through packing in a perforated fitting 26 and into a compressed air cylinder 25 where it carries a piston 24 indicated by dotted lines. A spring, not shown, tends always to elevate the piston and pad 20 against cornpressed air admitted to the top of the cylinder 25.

A bracket 26 is clamped to the cylinder 25 and carries a tubular valve 27 which is connected by a discharge pipe 28 to the head of the cylinder 25 and controlled by a trigger 29, shown in ON position in FIGS. l and 2 in which the forepart pad 20 is advanced under compressed air pressure, thus clamping the upper to the last and tilting the last sufficiently to bind it securely upon the last spindle 16 of the jack. An air supply pipe 30 leads to the end of the valve 27 uppermost in FIG. l. When the trigger 29 of the valve is in ON position compressed air is admitted to the cylinder 25 and the pad 20 is held in firm contact with the forepart of the assembled last and upper. These shoe parts are thus held firmly in the jack with the bottom of the last fully exposed and in convenient position for further shoemaking operations. The shoe thus jacked may be presented, either side up, to trimming, cementing or pulling over devices or the like, Upon tripping the trigger 29 the valve opens an exhaust passage from the cylinder 25 whereupon the pad 20 is retracted by spring action and all parts released. The body of the jack is longitudinally extensible to adjust the distance between the spindle 16 and the forepart pad 20 for diferent'sizes.

The toe end appliance as shown in FIGS. l and 2 is arranged to be mounted on a shaft 31 which projects outwardly from the fitting 26 to receive the cylindrical body 32 of the appliance. This in turn is drilled vertically for the reception of a long vertical shaft 33. A compression spring 34 surrounds the shaft 33 between an adjustable collar 35 and the body 32 and tends always to lift the shaft 33. A bracket 36 is clamped to the upper end of the shaft 33 and carries an adjustable arm 37 from which projects a tool in the form of a sharp stab point 38. The spring 34 normally holds the point 38 in inoperative position above the toe portion of the last 10 upon which an insole 10 has now been laid and registered.

The toe end appliance is in itself a complete poweroperated unit organized about the cylindrical body 32 which serves as a handle when the appliance is detached and a connecting medium for attachment with the body of the jack.

An apertured arm 40 is secured to the lower end of the shaft 33 by `a set screw 41 and to the lower side of this arm is secured a compressed air cylinder 42. A piston ro'd 43 having a piston 44 works in this cylinder. The piston rod 43 reacts through a yoke-shaped head 44 fitted to the under side of the body 32. When fluid pressure is admitted to the cylinder 42 the piston rod drives down the shaft 33 through the connecting arm 40. The stab point 38 is thus thrust into the insole 10' and usually penetrates into the last bottom positively fixing in place the toe end of the insole.

The body 32 is extended as a bracket to hold a cylindrical valve 45 having a compressed air supply tube 46 and an outlet pressure tube 47 leading to the bottom of the cylinder. The valve is controlled by a trigger 48 which in FIG. 2 is shown in its ON position where the piston 44 is held at the bottom of its stroke.

As already noted the body section 13 of the jack is shouldered and extended rearwardly in the form of a bar 18 for the reception of the heel end appliance shown in FIG. 3. This also is a complete power-operated unit. It includes in its structure a hollow cylindrical body 50 bored to receive the bar 18 and drilled vertically to receive a long shaft 51 and its bushing 52.

An apertured arm 53 is adjustably secured to the shaft 52 by -a set screw 54. A compressed air cylinder 55 is fitted in the arm 53 and in this works a piston 56 and piston ro'd 57 which reacts through a forked head 58 fitted against the under side ofthe body 50 of the appliance. At its upper end the shaft 51 carries an adjustable arm 58 from which projects a stab point 59. A compression spring 60 surrounds the shaft 51 between the body 50 and adjustable collar 61 and serves to urge the rod 51 to the upper limit of its travel. The jack and heel end appliance are so connected and adjusted that the stab point 59 is located vertically above an aperture or plug in the heel plate of the last. Accordingly, when compressed air is admitted to the cylinder 55 the shaft 51 is driven down and the stab point 59 thrust into the rear end of the insole 10'.

The outer end of the body is extended as a bracket 62 to receive a cylindrical valve 63 having a compressed air supply tube 64. An outlet pressure tube 65 leads from the valve to the bottom of the cylinder. The valve is co-ntrolled by a trigger 66 which in FIG. 3 is shown in its ON position where the shaft 51 has been lowered against action of the spring A60.

In using the jack herein described it may be supported, either side up, and the upper carrying last spindled with its forepart in contact with the pad 20. The upper may be now straightened and a-djusted on the last. The valve 27 is then opened and the `forepart pad is at once advanced thereby rocking or tilting the last and binding it upon the spindle 16 and also clamping the upper in position on the last. The last bottom is thus presented in the most convenient position for reception of the insol-e This may be accurately registered with the toe end of the last.

While the jack remains supported in this position the toe end appliance is brought into action by being telescoped upon the shaft 31 as shown in FIG. 2. The valve 45 is then opened and the stab point thrust into the toe end of the insole 10', and held in that position.

The heel end appliance is now brought into action by telescoping its body 50 upon the bar 18 and the Valve 63 opened so that the stab point 59 is thrust into the heel-seat end of the insole and held in its penetrating position.

The assembled shoe parts are thus al1 locked together in the relationship desired for side lasting or other treatment an'd they are also firmly held in the jack which serves as a convenient carrier jig or xture in the manufacturing procedure.

While the jack of -my invention is herein shown as incorporating compressed air means for actuating its elements, it would be within the scope of the invention and the full equivalent thereof to employ electrically-operated solenoids with exible service cables in place of the uidpressure cylinders and tubes of the illustrated jack.

Having thus disclosed my invention and described in detail an illustrative embodiment thereof, I claim as new and desire to secure by Letters Patent:

1. A mobile power-operated jack `for preparing shoe parts for shoemaking operations such as side lasting, the jack comprising an elongated body carrying near one end a projecting last spindle and near the other a transversely movable forepart pad, and valve-controlled means carried by the body of the jack for moving the pad for clamping an upper in position on a last which has been mounted on said spindle, the body of the jack carrying also at opposite ends respectively a heel end appliance and a toe end appliance both provided with power-operated tools for engaging and holding an insole in position on the bottom of a spindled last.

2. A mobile power-operated jack for preparing shoe parts for shoemaking operations such as side lasting, the jack comprising an elongated body carrying near one end a projecting last spindle and near the other a transversely movable forepart pad, and valve-controlled means carried by the body of the jack for moving the pad for clamping an upper in position on a last which has been mounted on said spindle, the body of the jack being shaped at each end to receive telescopically an appliance carrying an insole stab tool and valve-controlled means for advancing the tool to engage an insole presented on the bottom of the spindled last.

3. A mobile power-operated jack for preparing shoe parts for shoemaking operations such as side lasting, the jack comprising an elongated body carrying near one end a projecting last spindle and near the other a transversely movable forepart pad, and valvecontrolled means carried by the body of the jack for moving the pad for clamping an upper in position on a last which has been mounted on said spindle, separate self contained units adjustably Amounted at opposite ends of the body, each having an insole stab point and Valve-controlled means for protecting its stab point into an insole located upon a last upon the spindle.

4. A mobile jack as described in claim 3, further characterized in that the valve-controlled means of the jack are operatively connected and operated through the medium of elongated compressed air tubes that permit free manipulation of the jack with shoe parts, fixed therein into any desired position or angle.

References Cited UNITED STATES PATENTS 965,046 7/1910 Straub 12-l4.2 X 1,010,800 12/1911 Pym 12-14.2 1,314,385 8/1919 Blake 12-127 1,436,065 11/1922 Topham 12-12'7 2,287,970 6/1942 Burby 12-142 2,730,733 1/1956 Walsh 12--14.2 X 2,980,931 4/1961 Gilbride l2-14.2 3,308,495 3/1967 Simmonds 12-127 PATRICK D. LAWSON, Primary Examiner. 

